Cedar Valley Trail
It runs through the counties of Linn, Benton, and Black Hawk. The southern 10 miles (16 km) as well as the northern 15 miles (24 km)  of the trail are paved with asphalt, with the remainder being lined with crushed limestone.
Because locomotives required the route to be flat, at no point in the trail does the grade exceed 2%.
Cities on the Trail
Trail repair after 2008 flood
In 2013 the trail was again open for all 52 contiguous miles. Two bridges had been washed out in the Iowa Flood of 2008. The Cedar River bridge about seven miles west of Brandon was covered by flood waters, and the limestone surface was washed away. In June 2012 the Black Hawk County, Iowa Board of Supervisors voted to award a contract with Herberger Construction Co., of Indianola, Iowa to build the new Cedar River crossing. The new 700 foot span was opened in the spring of 2013. 
Prior to 1977, the path of the trail was used as a railroad corridor by Illinois Central Railroad. That year, the corridor was abandoned and the tracks were removed. The Iowa state legislature and nonprofit organizations such as the Iowa Natural Heritage Foundation and the Federal Land and Water Conservation Fund raised the funds necessary to purchase the site by 1983. The following year, the trail opened to public traffic.